Cutting elements for downhole cutting tools
AssigneeUlterra Drilling Technologies, L.P.
InventorRyan K. Matthews
Life of this patent
Estimating the term…
Abstract
A cutter for a downhole bit includes a first face oriented in the direction of rotation of the bit and a second face oriented toward the borehole wall. A substrate supports the first face and second face and the substrate is received in a recess of the bit.
Claims27
A cutter for a downhole cutting tool to contact a borehole wall comprising:
- an ultrahard front face oriented generally in the direction of rotation of the tool;
- an ultrahard outer face oriented generally in a radial direction configured for maintaining spacing between the borehole wall and a body of a bit on which the cutter will be mounted;
- and
- a base supporting the ultrahard front face and the ultrahard outer face to be received in a recess of the tool, wherein the base includes a planar face opposite to the ultrahard front face, and wherein the ultrahard outer face extends to the planar face of the base.
A cutter for a downhole cutting tool including:
- a front table of polycrystalline diamond (PCD);
- a gage table of PCD;
- and
- a base with a first interface to the front table and a second interface to the gage table transverse to the first interface and spaced side surfaces extending transverse and between the front table and the gage table, wherein the spaced side surfaces are generally planar.
A cutter for a downhole cutting tool including:
- a diamond table defining a first curved portion with a radius of curvature about a first axis;
- and
- a base supporting the diamond table, the base defining a second curved portion with a radius of curvature about a second axis generally perpendicular to and spaced from the first axis, wherein the base includes two spaced side faces that are generally parallel to each other and joined by the second curved portion.
A cutter for a downhole cutting tool comprising:
- a front surface for cutting formation and an outer surface oriented transverse to the front surface, the outer surface being configured to contact a borehole wall so as to maintain spacing between the borehole wall and a body of a bit on which the cutter will be mounted, the front and outer surfaces each being defined by an ultrahard material;
- and
- a base underlying and supporting the front and outer surfaces, the base being defined by a material different from the front and outer surfaces.
A cutter for a downhole tool comprising a cutting face, a gage face and a base supporting the cutting and gage faces, the cutting face facing generally forward and the gage face facing generally outward, and the base including a curved surface diametrically opposite the gage face for enabling it to be brazed into a pocket in the downhole tool, wherein the gage face is configured to contact a borehole wall so as to maintain spacing between the borehole wall and a body of the downhole tool on which the cutter will be mounted.
Dependencies are inferred from the claim text.